The link is to a colorized video from 1920 which shows snippets of action from the Yankees playing the Indians at League Park. Based on events that are shown, I'm guessing that the game was played on either Sept. 9 or 10 of that year. The players came from the dugouts to cover the field with the tarp during a rain delay.

Also, the last two minutes of the video shows John McGraw and a few unidentified Giants practicing at the Polo Grounds.

Unfortunately, the video has no sound.

https://www.youtube.com/watch?v=0tvmkAnqJvw